US2908009A

US2908009A - Belt-fastening machines

Info

Publication number: US2908009A
Application number: US764158A
Authority: US
Inventors: John J Potter
Original assignee: Hayden Nilos Ltd
Current assignee: Hayden Nilos Ltd
Priority date: 1958-01-15
Filing date: 1958-09-29
Publication date: 1959-10-13
Anticipated expiration: 1976-10-13

Description

Get. 13, 1959 Filed Sept. 29, 1958 J. J. POTTER 2 ,908,009

BELT-FASTENING MACHINES 3 Sheets-Sheet l I wil 54 i a 6 7 E L 15 55 Q I W A Home y Oct. 13, 1959 J. J. POTTER 2,908,009

- BELT-FASTENING MACHINES Filed Sept. 29, 1958 3 Sheets-Sheet 2 2/ Inv lor 62., 25- QMLQ/MM WC Attorney Oct. 13, 1959 J. J. POTTER BELT-FASTENING MACHINES 5 Sheets-Sheet 3 Filed Sept. '29, 1958 United States Patent O 2,908,000 Patented Oct. 13, 1959.

BELT-FASTENm G MACHINES John J. Potter, Sheffield, England, assignor to Hayden- Nilos Limited, Sheifield, England Application September 29, 1958, Serial No. 764,158

Claims priority, application Great Britain January 15, 1958 4 Claims. (Cl. 1-49.4)

This invention relates to belt-fastening machine of the type in which a jaw unit is movable progressively across the end of conveyor or driving belt to insert and clinch into the belt the pointed bent ends of hooks positioned in a row in a comb-bar located along the end of the belt, leaving the bases of the hooks projecting at the end as a row of loops to be linked to a similar row in another belt end by the insertion of flexible hinge.

The object of the invention is to provide a machine that will satisfactorily and expeditiously insert double hooks of which one limb of each is connected to the other to form a bridge over which the pointed bent ends of the other limbs of each are turned after penetration of the belt. This double type of hook has the merit of only needing two points to be formed on it, so that it can, in a preferred form, be very easily made from a length of wire pointed at both ends and bent to form two open hooks connected by an integral bridge, each hook having a single pointed bent end. It also has the advantage that the turning of the points over the bridge interposes the metal of the bridge as a resistance to lifting of the points out of the belt, which resistance is particularly effective if the points emerge from the belt inside the bridge and are then turned over to the outside of it.

In contradistinction to single hooks, which require each pointed length to be closed through similar angles to bring the points of each to and through the belt from opposite sides, it is only the two pointed lengths of a double hook that require to be closed through any considerable angle to effect pentration of the belt, but great care is necessary to position the open hook accurately with respect to the belt end and to ensure that the points are in correct relation to the bridge to emerge from the belt in position to be turned over the bridge.

According to the present invention, a belt-fastening machine for the insertion of double hooks as above defined comprises a jaw unit with two jaws and a comb-bar, means to move the jaw unit progressively along the comb-bar with the latter disposed transversely to the jaws of the unit and with the jaws embracing the comb-bar to engage respectively when closed the lengths with the pointed bent ends and the bridged lengths of each double hook in turn of a row of hooks positioned in the comb-bar, a fixed foot positioned to bear on the outer side of the hook lengths leading to the bridge, where those lengths emerge from the comb-bar, one jaw being movable to bear on those lengths beyond the foot, with die recesses for turning over the bridge the pointed ends of the hook, and the other jaw being movable to bear on the outer side of the lengths of the hook ending in the points, and means for closing the jaws on to the hooks after a belt end has been presented to the jaw unit and comb-bar. The foot supports the bridge portion of the double hook against one side of the belt while one jaw forces the pointed lengths of the hook through the belt until the bridge portion of the hook is also supported by the other jaw. The bridge is thus held in correct position to re ceive the hook points, first by the foot and then by the other jaw. Although one jaw meets the pointed lengths before the other jaw meets the bridge portion, it is convenient for the jaws to make equal closing movements, and they may indeed be operated in identical manner by common means, hand or mechanical, e.g. oppositely movable lever-handles.

Preferably, the inner side of the hook lengths leading to the bridge have secured across them a wire, which is a longitudinal wire of a complete comb of hooks, and the slotted face of the comb-bar, through which the two bases of each double hook are inserted, may be cut back to form a lengthwise lipped recess in which this wire fits. This may be used to ensure that the hooks are not inverted in being inserted into the comb-bar, because the longitudinal wire of the inverted comb finds no recess in which to fit, and the bases of the hooks could not then penetrate the bar slots sufficiently to receive a securing rod inserted lengthwise inside the comb-bar. With the comb correctly applied, this rod slides easily through the bases.

The jaw to engage the bridge portions of the hooks is preferably the lower jaw, the fixed foot then projecting below the level at which the belt end is inserted. To accommodate belts of different thicknesses, the upper jaw may be adjustable for height in its jaw lever, e.g., by means of a screw with a knob.

This invention will now be further described with reference to the accompanying drawings, in which Figure 1 is a plan view of one form of machine for inserting a row of double hooks;

Figure 2 is a side elevation of Figure 1;

Figure 3 is a part-sectional side elevation of the jaw unit of the machine of Figures 1 and 2, to a larger scale, the jaws being open;

Figure 4 corresponds to Figure 3 but shows the jaws closed;

Figure 5 is a fragmentary end elevation Viewed in the direction of the arrow A in Figure 3;

Figure 6 is a perspective view of a short row of double hooks;

Figures 7 and 8 are respectively a plan and side elevation of the jaw unit of another form of machine; and

Figure 9 is an enlarged part-sectional view of the upper end of Figure 2, showing the jaws open about a comb-bar inserted in the jaw unit.

In Figures 1 and 2, side frames are formed largely of metal tube, providing upper and lower rails =1, 2, connected by a curved rear end 3, the forward ends 4 of the lower rails 2 curving upwardly, so that the lower rails form skids for easy movement of the machine. Up-

'

right plates

6, 7 are welded between the rails *1, 2. The

rear ends 3 are connected by welding to a tubular rear tie 8, and the front ends of the rails 1 are connected by welding to a front tie 9, the complete frame being light in weight, yet robust. The front curved ends 4 of the lower rails 2 are connected by a T-section 10 (Figure 2) forming a lower fixed clamping bar. A movable upper clamping bar 11 of inverted channel section, with chamfered edges 12, is carried between standards 13 on the rails 1, with levers 14 (Figure l) to press the bar 1'-1 by means of springs 15 on to a belt 16 (Figures 3 and 4) placed on the bar 10 with the line of its edge partly entering notches "17 in the plates 7.

A rack bar 18 extends between the plates 6 and a comb-bar 19 between the plates 7, the two bars serving as transverse guides for a jaw unit 20.

Side plates

21, 22 of the jaw unit (Figures 2, 4, 7, and 8) slide on the rack bar 1 8 at the rear end of the unit 20 and partly embrace the comb-bar 19 at the front end. On a transverse pivot 23 are mounted upper and lower jaw levers 3 24, 25, the former having a cheek 26 adjustable by a screw '27 with a knurled head 28 in accordance with the thickness of the belt 16, while the latter has a fixed cheek 29. The

cheeks

26, 29 may, however, be replaceable in accordance with the size and type of double hooks 30.

The jaw levers 24, 25 are connected by toggle links 31 to a slider 32 movable along slots 33 in the side plates 21, '22, and the slider 32 is connected by upper and lower

curved links

34, 35 to

short lever arms

36, 37 respectively, these arms being operated by tubular lever handles 38, 39, movable in opposite directions, and detachable from

stubs

40, 41, but anchored by chains 42, so that they may be folded flat for transport or storage, as shown in Figure l.

The cheek ends of the jaw levers 24, 25, emerge from one end of a split casing 43, which otherwise encloses the jaw-operating mechanism. The slider 32 has a projection '44 lying within a side casing 45, from which projects a pawl 46 to engage the rack bar '18 at each complete operation of the

levers

24, 25 to transverse the jaw unit 20 by the space of one tooth 47.

When the

levers

24, 25 are open (Figure 3), the upper check 26 lies clear of the pointed ends 48 of the row of double books 30 located in slots 49 along the front of the tubular comb-bar 19. The lengths 50 leading to the bridge 51 of each double hook (Figure 6) rest on a fixed foot :72 supported at the front of the comb-bar 19 by brackets 53 extending from the lower parts of the side plates 21, 22 (Figures 3 and The top face of the foot 52 supports the hook lengths 50 horizontally just below the belt 16, the end of which abuts the flat face 54 of the combbar '19, which face is cut back to form a lip 55. The lip '55 provides a recess into which fits a wire 56 welded across the hook lengths 5%. The wire 56 forms all the hooks 30 into a row of any desired length, and also ensures that the hooks can only be applied to the combbar 19 with the pointed ends 48 uppermost, because only when the wire 56 fits against the lip 55 can the base loops 57 extend sufficiently inside the comb-bar 19 for a securing rod 58 to be slid into the loops.

The bottom cheek 29 lies well below the belt 16 when the jaw levers 24, 25 are open (Figure 3), and a gap 59 behind the cheek surrounds the foot 52 when the

levers

24, 25 are closed (Figure 4).

With the hooks 30 located by the comb-bar 19 and with their lengths 5i? supported by the foot 52, closing of the jaw levers 24, 25 causes the upper check 26 to engage the pointed ends 43 of one double hook 30 and to force the two points through the belt 16. Because of the support provided by the foot 52, the bridge 57 of that double hook is correctly positioned for the points to emerge inside it as they penetrate the belt. At this time, the lower cheek 29 has made an idle movement below the belt v16, but now comes into contact with the lengths -50, to provide support beyond the foot 52 and to position recesses 60 opposite the emerging points 48. The recesses turn these points 48 outwardly under the bridge 51, the underside of which has two indentations to receive the points. Complete closing of the.

cheeks

26, 29 applies considerable pressure to the inserted hooks, as may be adjusted appropriately to the thickness of the belt 16 by the screw 27 of the upper check 26.

As shown by Figure 5, the two recesses 60 in the lower cheek 29 lie to one side of the face 62 of the check. The other side of that face applies renewed pressure to the inserted hooks 30 on the next closing of the jaw levers '24, 25, while the next double hook is being inserted. The face 62 of the cheek 29 and the face 63 of the cheek 26 are serrated, which assists in keeping the hooks in line during closing of the hooks. As shown by Figures 1, 2, and 5, the comb-bar 19 is cut away at 64 to allow the base loops 57 of hooks inserted in the belt 16 to pass when a beit requiring more hooks 30 than the slots 49 of the comb-bar 19 can accommodate is moved transversely of the machine. For the same reason, the

4 plates 7 have the notches 17 to provide for passage of the end of the belt 16 into and out of the machine.

In Figures 7, 8, and 9, a jaw unit 65 having

jaws

66, 67 operated by lever handles 68 has a recess 69 into which a separate comb-bar 7 0 (Figure 9) can be slidably inserted, to position hooks '30 for reception by a belt 16 to which the comb-bar 70 is temporarily clamped. A fixed foot 71 lies inside the jaw 67 to position the hooks 30 while the jaw 66 forces the pointed ends through the belt, after which the jaw 67 causes the pointed ends to be turned over the bridge of each hook, as before, The jaw unit carries a pawl 72 (Figure 7) to engage teeth 73 (Figure 9) on the comb-bar 76 to traverse the jawunit after each operation.

What I claim is:

1. In a beltfastening machine of the kind comprising a jaw unit with two jaws similarly movable in opposite directions, means to move the jaw unit progressively along a comb-bar having a slotted face for the insertion of the bases of hooks to be inserted into a belt, with the comb-bar disposed transversely to the jaws and with the jaws embracing the comb-bar to engage when closed the hooks positioned in the comb-bar, and means for closing the jaws simultaneously after a belt end has been presented to the comb-bar, the provision of a fixed foot carried by the jaw .unit to bear on the outer side of the bridged lengths of a double hook having lengths with pointed bent ends and lengths connected by a bridge over which the pointed ends are turned after penetration of a belt, with the foot mounted to bear on these bridged lengths where the latter emerge from the comb-bar and to position them with their inner side extending at right-angles to the slotted face of the combbar, one jaw being movable to bear on the outer side of the lengths of the hook ending in points, and the other jaw being movable to bear on the bridged lengths beyond the foot, with die surfaces on that other jaw for turning over the bridge the pointed ends of the book.

2. In a belt-fastening machine of the kind comprising a jaw unit with two jaws similarly movable in opposite directions, means to move the jaw unit progressively along a comb-bar having a slotted face for the insertion of the bases of hooks to be inserted into a belt, with the combbar disposed transversely to the jaws and with the jaws embracing the comb-bar, to engage when closed the hook positioned in the comb-bar and means for closing the jaws simultaneously after a belt end has been presented to the comb-bar, the provision of a fixed foot carried by the jaw unit to bear on the outer side of the bridged lengths of a double hook having lengths with pointed bent ends and lengths connected by a bridge over which the pointed ends are turned after penetration of a belt, with the foot mounted to bear on these bridged lengths where the latter emerge from the comb-bar and to position them with their inner side extending at right-angles to the slotted face of the comb-bar, and the provision of a lengthwise lipped recess in the slotted face of the combbar to receive a wire connected across the bridged lengths of a number of double hooks, one jaw being movable to bear on the outer side of the lengths of the hook ending in points, and the other jaw being movable to bear on the bridged lengths beyond the foot, with die surfaces on that other jaw for turning over the bridge the pointed ends of the hook.

3. In a belt-fastening machine of the kind comprising a jaw unit with two side plates, two jaws similarly movable in opposite directions, between and projecting beyond the ends of the side plates, means to move the jaw unit progressively along a comb-bar having a slotted face for the insertion of the bases of hooks to be inserted into a belt, with the comb-bar disposed transversely to the jaws and with the jaws embracing the comb-bar to engage when closed the hooks positioned in the comb-bar, and

means for closing the jaws simultaneously after a belt end has been presented to the comb-bar, the provision of two brackets projecting from the ends of the side plates, and a fixed foot between the brackets to lie between those ends and one of the jaws, to bear on the outer side of the bridged lengths of a double hook having lengths with pointed bent ends and lengths connected by a bridge over which the pointed ends are turned after penetration of a belt, with the foot mounted to bear on these bridged lengths where the latter emerge from the comb-bar and to position them with their inner side extending at rightangles to the slotted face of the comb-bar, one jaw being movable to first engage the hooks by the pointed lengths to cause them to penetrate the belt while the bridged lengths are supported by the fixed foot, and the other jaw having die recesses and being movable to bring the latter into engagement with the emerging points beyond the fixed foot to turn the points over the bridge.

4. In a belt-fastening machine of the kind comprising a jaw unit with two jaws similarly movable in opposite directions, means to move the jaw unit progressively along a comb-bar having a slotted face for the insertion of the bases of hooks to be inserted into a belt, with the combbar disposed transversely to the jaws and with the jaws embracing the comb-bar to engage when closed the hooks 6 positioned in the comb-bar, and means for closing the jaws simultaneously after a belt end has been presented to the comb-bar, the provision of a fixed foot carried by the jaw unit to bear on the outer side of the bridged lengths of a double hook having lengths with pointed 'the outer side of the lengths of the hook ending in points to enable the machine to operate on belts of different thickness, the other jaw being movable to bear on the bridged lengths beyond the foot, with die surfaces on that other jaw for turning over the bridge the pointed ends of the hook.

I References Cited in the file of this patent UNITED STATES PATENTS 2,255,855

Matthei Sept. 16, 1941